第 2 集: Kazuki 挑戰 Yuuji 在代管房屋期間度過無色情的一天

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With the parents of both households stuck on a South American island for an indeterminate time, they ask their children to take care of each other. Kazuki refuses to admit the dirty-minded Yuuji into the home, unless he manages to spend the whole day without doing anything indecent, so they have a competition. (Source: Wikipedia)